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| гумус; перегной | |||
| чернозёмная почва | |||
| чернозём | |||
| чернозём (fertile black earth MichaelBurov) | |||
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| чернозём | |||
| chernozem: 74 phrases in 9 subjects |
| Agriculture | 15 |
| Agrochemistry | 15 |
| American usage, not spelling | 2 |
| Ecology | 24 |
| General | 1 |
| Geography | 3 |
| Hydrology | 1 |
| Makarov | 5 |
| Soil science | 8 |